Include and use a run-parts.sh for tests
to allow to run tests on non-Debian systems Note: defaults to --exit-on-error to give failed tests more prominence and to ensure a non-zero exit-code in case of test failures
I think we should either write this in
Makeitself or move & rename this to under the
tests/directory, instead of pretending this is a general tool to be used elsewhere around the repo.
(I think we should definitely at least follow the existing coding style used shell in this project if we are keeping this code, regardless of the location/filename.)